If you are sure that your W95 machine is properly configured to logon to your domain (see tip 248) and you can not connect to a Windows 95 share, you may have encountered an obscure bug in mup.sys.
Make a backup copy of %SystemRoot%\System32\Drivers\mup.sys and copy the origonal from the Windows NT CD-ROM. Reboot.
If this works for you, thank Michael Bormann, who provided this tip.
You should also visit http://www.microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/MS00-072.asp and download the patch for your W9x computer.